<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <simple-counter></simple-counter>
        <simple-counter></simple-counter>
        <simple-counter></simple-counter>
    </div>
    <script src="../js/vue.js" charset="utf-8"></script>
    <script type="text/javascript">

        Vue.component('simple-counter', {
            template: '<button v-on:click="counter += 1">{{ counter }}</button>',
            data: function () {
                return {
                    counter: 0
                }
            }
        })

        var vm = new Vue({
            el: '#app'
        })
    </script>
</body>
</html>
